A chair will do. It can be set on its side. Out in the open, not against a fence. You don't want a chick to get trapped behind it, you want it to be able to duck behind it and then disappear. A sheet of plywood or a pallet, leaned up agaist a fence to make an open-ended tunnel. A table, or an old coffee table that they can climb on. NOT near your fences so they can't use it as a launch pad to get over the fence into the neighbor's yard. A kid's outgrown old swing set. That kind of thing.
